I want to add to make sure that you measure your overall pace by how long it takes you to finish a mile including any and all character stops, photo stops, restroom breaks, etc. So if with all those stops it takes you 30 minutes to finish a mile, that's your time. You don't want to be swept because you misunderstood how the time works.
This does not mean that if you have a slower mile that you will be swept. You just need to make sure that you are ahead of the sweepers at all times. Course congestion during this year's Star Wars 10K gave me a first mile of 20 minutes. Suffice it to say, once the congestion cleared up, my time got better and I was just fine.